| 摘要: |
| 森林土壤有机碳是全球森林生态系统土壤碳库的重要组成部分。利用森林土壤有机碳实测数据估算了梅州市土壤有机碳、碳密度及碳储量,分析了土壤有机碳含量的空间分布格局。结果表明：梅州市林地土壤有机碳在6.48~10.48 g.kg-1之间,平均值为8.41 g.kg-1,土壤养分等级为Ⅰ级~Ⅳ级,变异系数为29%~78%,属中等变异程度。各区(县)森林土壤有机碳含量的大小排序依次为平远县>蕉岭县>兴宁县>梅江区>大埔县>梅县区>丰顺县>五华县。梅州市土壤碳密度在92.78~150.13 kg.m-2之间,平均值为120.44 kg.m-2。梅州市林地土壤总碳储量为14102.90万t,各区(县)碳储量贡献值依次为五华县>丰顺县>大埔县>梅县区>兴宁县>蕉岭县>梅江区>平远县。梅州市林地土壤碳含量空间分布格局为东高西地,且随着土层的加深,有机碳含量呈逐渐减少的变化趋势。 |
| 关键词: 梅州市 土壤有机碳 碳储量 空间分布 |
| DOI： |
| 分类号: |
| 基金项目:广东省科技计划项目（2019-07） |
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| Soil Organic Carbon Stocks and Spatial Distribution Characteristics of Forest Land in Meizhou City |
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zhangzhongrui1, zhaozhiming1, dengzhiwen2, 谢镇东1, dengzewei1, zhuhangyong1
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1.Guangdong Academy of Forestry / Guangdong Provincial Key Laboratory of Silviculture Protection and Utilizationy;2.Guangdong Academy of Foresty
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| Abstract: |
| Forest soil organic carbon (FSC) is an important component of the global soil carbon pool of forest ecosystems. Soil organic carbon, carbon density and carbon stocks in Meizhou City were estimated using actual forest soil organic carbon measurements, and the spatial distribution pattern of soil organic carbon content was analysed. The results showed that the soil organic carbon of forest land in Meizhou City ranged from 6.48 to 10.48 g.kg-1, with a mean value of 8.41 g.kg-1, and the soil nutrient classes ranged from level I to level IV, with a coefficient of variation of 29% to 78%, which is a medium degree of variation. The ranking of the size of forest soil organic carbon content in each district (county) was Pingyuan County > Jiaoling County > Xingning County > Meijiang District > Tai Po County > Meixian District > Fengshun County > Wuhua County in order. Soil carbon density in Meizhou City ranged from 92.78 to 150.13 kg.m-2, with an average value of 120.44 kg.m-2. The total soil carbon stock in forest land in Meizhou City was 141,029,000 t, with the contribution of each district (county) in the order of Wuhua County > Fengshun County > Tai Po County > Meixian District > Xingning County > Jiaoling County > Meijiang District > Pingyuan County. The spatial distribution pattern of soil carbon content of forest land in Meizhou City is higher in the eastern part and lower in the western part, and with the deepening of the soil layer, the organic carbon content shows a gradually decreasing trend. |
| Key words: Meizhou city soil organic carbon carbon stock spatial distribution |
